DS3231 Precision RTC Real Time Clock with Build-in 32K EEPROM

Precision Timing 2.3v to 5.5v Built-in 2 alarms Built-in Temperature Sensor
£4.00 GBP
The price is for a single piece.
There are 3 pieces in the retail box.
The quantity has to be a multiple of 3.
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Frequently Bought Together

Total price:£10.00

Please note that this module is designed for use with the LIR2032 rechargeable lithium-ion coin cell battery. If you intend to use a CR2032 battery instead, you will need to remove either the resistor or the diode to disable the charging circuit.

Introducing the magnificent Lonely Binary DS3231, the ultimate timekeeping marvel that will never let you miss a beat! Designed with the future in mind, this device is equipped with a battery input terminal, ensuring precise timing even when the main power supply takes a breather. Say goodbye to those frustrating moments of resetting clocks and watches after a power outage!

But that's not all - our DS3231 boasts an integrated crystal oscillator that not only enhances accuracy but also simplifies your production line by reducing the number of components. With options for commercial grade and industrial grade temperature ranges, this 16-pin 300mil SO packaged wonder is built to withstand any environment.

Prepare to be wowed as this remarkable Real-Time Clock (RTC) saves and safeguards every second, minute, hour, day of the week, date, month, and year information. Worried about months with less than 31 days? Fear not! The DS3231 automatically adjusts the date at the end of the month, even accounting for those leap years. We've got your back until the year 2100!

Versatility is our middle name! Choose between the classic 24-hour format or the AM/PM-indicated 12-hour format, whichever suits your style. Plus, we've included not one, but two configurable calendar alarms to keep you on track. Need a little extra rhythm in your life? Our DS3231 also provides a configurable square wave output, because who doesn't love a good beat?

And let's not forget the seamless connectivity! With the I2C bidirectional bus and lightning-fast transmission speed of 400KHz (when working voltage is 5V), accessing the DS3231's treasure trove of data is a breeze.

Embrace the future of timekeeping with the Lonely Binary DS3231 and experience precision, reliability, and a touch of magic. Trust the brand that's committed to keeping you in sync, and let Lonely Binary be your guide through the enchanting world of time.



Lonely Binary Product Schematics


What’s in the Box

There are 3 pieces in the retail box.
The listing price is for

  • 1 x DS3231 Time Clock



  • Australia Orders over $55 - Your order will enjoy free shipping via Australia Post Standard Shipping Services. 
  • International Orders over $99 - Your order will be posted via Australia Post Air Mail Services. 

Raspberry Pi board / Micro:bit board / NVIDIA board will be excluded; All PCB orders will not enjoy free shipping. Distributors and wholesale orders are not eligible for free shipping.


At this time, LONELY BINARY is an online-only business, with our products available through lonelybinary.com. This allows us to keep the cost down for the customer. Orders cannot be picked up. 


We ship Australia wide to all addresses, including PO Box, Parcel Locker, etc.All Australian orders will be shipped via Australia Post, Courier Please or Fastway Couriers (Aramex). International Orders will be shipped via Australia Post or DHL. Your order will be shipped within one business day after we receive payment, providing the items are in stock.

  • Standard Shipping
    Sent via standard Australia Post stamped letter mail, typically 5-9 business days. No tracking/support available other than confirmation of dispatch.
  • Express Post
    Sent via Australia Post Express Service, Fastway Courier or Courier Please, 1 – 2 business days for metro orders, potentially longer for orders outside of metro zones, with full tracking.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Shipping costs for international orders vary depending on location and package size, where possible we have kept this to flat rate charges to reduce confusion. International orders are shipped through Australia Post and DHL courier service depending on the most economical at the time. 


Shipping Method via Delivery Area Delivery Time(business day) Tracking No. Weight Limit
DHL Asia 1-2 YES No Limit
western EU 2-3 YES No Limit
eastern EU 3-5 YES No Limit
North America 2-3 YES No Limit
Australia 2-3 YES No Limit
South America 3-5 YES No Limit
South Africa 3-5 YES No Limit


Customer Reviews

Based on 1 review
Happy client
DS3231 RTC

Behaves as expected. Installed Li2032 battery. Time seems accurate. I have used the EEPROM with ESP32 in Arduino IDE with #include "uEEPROMLib.h" and it is good.